6f63e9d0c6
[SVN r64705]
113 lines
7.3 KiB
HTML
113 lines
7.3 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<meta name="generator" content="Docutils 0.7: http://docutils.sourceforge.net/" />
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<title>The MPL Reference Manual: char_</title>
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<body class="docframe refmanual">
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<table class="header"><tr class="header"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./integral-c.html" class="navigation-link">Prev</a> <a href="./data-types-miscellaneous.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./integral-c.html" class="navigation-link">Back</a> Along</span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./numeric.html" class="navigation-link">Up</a> <a href="../refmanual.html" class="navigation-link">Home</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./refmanual_toc.html" class="navigation-link">Full TOC</a></span></td>
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<td class="header-group page-location"><a href="../refmanual.html" class="navigation-link">Front Page</a> / <a href="./data-types.html" class="navigation-link">Data Types</a> / <a href="./numeric.html" class="navigation-link">Numeric</a> / <a href="./char.html" class="navigation-link">char_</a></td>
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</tr></table><div class="header-separator"></div>
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<div class="section" id="char">
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<h1><a class="toc-backref" href="./numeric.html#id1581">char_</a></h1>
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<div class="section" id="id1262">
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<h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3>
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<pre class="literal-block">
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template<
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char N
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>
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struct <a href="./char.html" class="identifier">char_</a>
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{
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// <em>unspecified</em>
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// ...
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};
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</pre>
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</div>
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<div class="section" id="id1263">
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<h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
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<p>An <a class="reference internal" href="./integral-constant.html">Integral Constant</a> wrapper for <tt class="literal"><span class="pre">char</span></tt>.</p>
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</div>
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<div class="section" id="id1264">
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<h3><a class="subsection-title" href="#header" name="header">Header</a></h3>
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<pre class="literal-block">
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#include <<a href="../../../../boost/mpl/char.hpp" class="header">boost/mpl/char.hpp</a>>
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</pre>
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</div>
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<div class="section" id="id1265">
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<h3><a class="subsection-title" href="#model-of" name="model-of">Model of</a></h3>
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<p><a class="reference internal" href="./integral-constant.html">Integral Constant</a></p>
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</div>
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<div class="section" id="id1266">
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<h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3>
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<table border="1" class="docutils table">
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<colgroup>
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<col width="21%" />
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<col width="42%" />
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<col width="37%" />
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</colgroup>
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<thead valign="bottom">
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<tr><th class="head">Parameter</th>
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<th class="head">Requirement</th>
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<th class="head">Description</th>
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</tr>
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</thead>
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<tbody valign="top">
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<tr><td><tt class="literal"><span class="pre">N</span></tt></td>
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<td>A character constant</td>
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<td>A value to wrap.</td>
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</tr>
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</tbody>
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</table>
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</div>
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<div class="section" id="id1267">
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<h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3>
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<p>The semantics of an expression are defined only
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where they differ from, or are not defined in <a class="reference internal" href="./integral-constant.html">Integral Constant</a>.</p>
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<p>For arbitrary character constant <tt class="literal"><span class="pre">c</span></tt>:</p>
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<table border="1" class="docutils table">
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<colgroup>
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<col width="24%" />
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<col width="76%" />
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</colgroup>
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<thead valign="bottom">
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<tr><th class="head">Expression</th>
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<th class="head">Semantics</th>
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</tr>
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</thead>
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<tbody valign="top">
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<tr><td><tt class="literal"><span class="pre"><a href="./char.html" class="identifier">char_</a><c></span></tt></td>
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<td>An <a class="reference internal" href="./integral-constant.html">Integral Constant</a> <tt class="literal"><span class="pre">x</span></tt> such that <tt class="literal"><span class="pre">x::value</span> <span class="pre">==</span> <span class="pre">c</span></tt>
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and <tt class="literal"><span class="pre">x::<a href="./value-type.html" class="identifier">value_type</a></span></tt> is identical to <tt class="literal"><span class="pre">char</span></tt>.</td>
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</tr>
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</tbody>
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</table>
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</div>
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<div class="section" id="id1268">
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<h3><a class="subsection-title" href="#example" name="example">Example</a></h3>
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<pre class="literal-block">
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typedef <a href="./char.html" class="identifier">char_</a><'c'> c;
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<a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same< c::<a href="./value-type.html" class="identifier">value_type</a>, char > ));
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<a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same< c::type, c > ));
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<a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same< <a href="./next.html" class="identifier">next</a>< c >::type, <a href="./char.html" class="identifier">char_</a><'d'> > ));
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<a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same< <a href="./prior.html" class="identifier">prior</a>< c >::type, <a href="./char.html" class="identifier">char_</a><'b'> > ));
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<a href="./assert-relation.html" class="identifier">BOOST_MPL_ASSERT_RELATION</a>( (c::value), ==, 'c' );
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assert( c() == 'c' );
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</pre>
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</div>
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<div class="section" id="id1269">
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<h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3>
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<p><a class="reference internal" href="./data-types.html">Data Types</a>, <a class="reference internal" href="./integral-constant.html">Integral Constant</a>, <a class="reference internal" href="./int.html">int_</a>, <a class="reference internal" href="./size-t.html">size_t</a>, <a class="reference internal" href="./integral-c.html">integral_c</a></p>
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<div class="footer-separator"></div>
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<table class="footer"><tr class="footer"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./integral-c.html" class="navigation-link">Prev</a> <a href="./data-types-miscellaneous.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./integral-c.html" class="navigation-link">Back</a> Along</span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./numeric.html" class="navigation-link">Up</a> <a href="../refmanual.html" class="navigation-link">Home</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./refmanual_toc.html" class="navigation-link">Full TOC</a></span></td>
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<td><div class="copyright-footer"><div class="copyright">Copyright © 2009 Eric Niebler</div>
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at <a class="reference external" href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)</div></td></tr></table></body>
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